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50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Sample.h"
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#include <AK/DisjointChunks.h>
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#include <AK/FixedArray.h>
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#include <AK/Noncopyable.h>
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#include <AK/Vector.h>
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#include <LibThreading/Mutex.h>
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namespace Audio {
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// A sample queue providing synchronized access to efficiently-stored segmented user-provided audio data.
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class UserSampleQueue {
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AK_MAKE_NONCOPYABLE(UserSampleQueue);
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AK_MAKE_NONMOVABLE(UserSampleQueue);
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public:
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UserSampleQueue() = default;
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void append(FixedArray<Sample>&& samples);
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void clear();
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// Slice off some amount of samples from the beginning.
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void discard_samples(size_t count);
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Sample operator[](size_t index);
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// The number of samples in the span.
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size_t size();
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bool is_empty();
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size_t remaining_samples();
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private:
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// Re-initialize the spans after a vector resize.
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void fix_spans();
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Threading::Mutex m_sample_mutex;
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// Sample data view to keep track of what to play next.
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DisjointSpans<Sample> m_enqueued_samples;
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// The number of samples that were played from the backing store since last discarding its start.
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size_t m_samples_to_discard { 0 };
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// The backing store for the enqueued sample view.
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DisjointChunks<Sample, FixedArray<Sample>> m_backing_samples {};
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};
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}
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